Manufacture of glass cylinders



C. ROBE MANUFACTURE OF GLASS CYLINDERS Feb. 19, 1924.

Filed Jan. 14. 1920 fwvezziar:

'mw ag- 40 well 4 which Patented Feb. is, was.

CLYDE S. ROBE, (1F CHARLEROI, PENNSYLVANI A, ASSIGNOR OF G'NE EALF TO CHARLES- a. KUNZLER, or rrrrsnoncsr, PENNSYLVANIA.

MANUFACTURE GLASS CYLINDERS,

Application filed January 14, 1920. Serial No. 351,389.

To all whom it may concern: I

Be it known that I, CLYDE S. Hons, a citizen of the United States, residing at Charleroi, in the county of Washington and 5 State of Pennsylvania, have invented certain new and useful Improvements in the Manufacture of Glass Cylinders, of which the following is a s ecification.

Referring to the rawing,

The figure isa sectional elevation of one form of glass drawing apparatus which may be used in carrying out the invention.

' .My invention has relation to the machine manufacture of window glass cylinders, and

more particularly to the method and means .for supplying air to the interior of the cylinder while it is being drawn. The object of the invention is to provide an air supply system of this character which will operate to very largely reduce the pulsation bumps of the cylinder.

The apparatus of this application is shown in my 'rior application Serial No. 142,622, filed anuary 16, 1917 on which my Patent No. 1,256,260 was issued February 12, 1918, and also in my Patent 'No. 1,356,739, issued @ctober 26, 1920.

In the accompanying drawing, I have illustrated my invention as applied. to a type of drawing apparatus in which the air for the cylinder is supplied upwardly through the bottom or" the pot, but my invention is not limited to such system of air supply,.

but maybe used in connection with other arrangements thereof.

In these drawings, the numeral 2 designates' a pot or receptacle of any usual or preferred construction and which is'moun'ted on the foundation 3 having therein the communicates upwardly through the bottom of the pot by means of the opening 5.

ings, I have illustrated the same form of' drawing apparatus as shown in "my said Patent No. 1,256,260, but it will be under- 6 is a nozzle block .supported on the bottom of the pot from the' stood that the present invention is independent of any particular form of bait or drawing apparatus.

shown as extending into the wel twith a delivery portion 8 arranged centrally within the opening 5,- and to which p1pe air is supplied from any usual or suitable In accordance with myinvention, the delivery portion 8 of the pipe 8 has an internal diameter, such that its cross sectional area is considerably smaller than the cross sectional area of the cylinder A, which is being drawn. The passage to the cylinder through the nozzle 6 beyond the end oi the pipe memberB should have a larger cross sectional area than the internal crosssectional areaof said pipe member, but smaller than the cross sectionalarea of the cylinder. The cross sectional area of the opening 5, adjacent to the discharge end of the pi e 8* should also be preferably less than t e d -designates an air supply pipe which 'is r cross sectional area of the cylinder being V drawn. I

It has been found that the arrangement shown is an efiective one, greatly reducing the pulsation bumps, the manner in which the delivery portion of the air suptern for the purpose of reducing pulsations,

such vent operating as an automatic regulator in a manner which is not thoroughly understood, but which is efi'ective in practice. 1 am not at present fully advised as to'the exact reasons which cause my improved arrangement of the air supply sys tem to operate as a more efficient vent than has heretofore been provided, but it appears to be due, in part at least, to the injector action of the air escaping from the pipe member 8 and which tends to draw air in from or through the well 4, while at the same time said well operates as an automatic release for any excess pressure which may occur within the cylinder being drawn.

The advantages of my invention result from the material reduction of the pulsation bumps of the cylinders produced, Whereby cylinders of any practicable length may eral requirements above stated, and the relative position .of the parts may also be changed.

I claim:

1; In apparatus for drawing glass cylinders, a stationary conduit having a passage leading to the bottom port-ion of the article being-drawn, an air supply pipe arranged to discharge thereinto, said conduit and its opening being in'injector relation to the discharge end of the air supply pipe and providing clearance space for escape of excess air, substantially as described.

. 2. In apparatus for drawing glass cylinders, a stationary conduit having a passage leading to the bottom portion of the article being drawn, an air supply pipe arranged to discharge "thereinto, said conduit and its opening being in injectorirelation to the discharge end of the air supply pipe and of less area than the cross sectional ,area of the article being drawn, substantially as described.

3. In apparatus for drawing glass cylinders, a stationary conduit haying a passage leading to the bottom portion of the article being drawn, an air supply pipe arranged to discharge thereinto, said conduit and its opening being in injector relation to the discharge end of the air supply pipe and of less area than the cross sectional area of the article being drawn, and the cross sectional area of the air supply pipe at its discharge end being less than the cross sectional area of said passage, substantially as described.

4. In the machine manufacture of glass cylinders. the method of supplying air to the interior of thecylinder being drawn; which consists in forcing a jet or stream of air under pressure from a conduit into and through a. passage leading directly to the bottom of. the cylinder and across a venting-- ply pipe leading to but spaced awa from I said conduit to supply air upwardtyt rough the conduit while allowing for mam flow drawing glass cylinof excess air backwardly through said conduit and around said pipe.

In testimony whereof I hereunto my signature.

earns s. nose: 

